Text in posts with more margin
 

Hi !

How can i increase the margin around the text in a post. I only want to increase this margin, and none other. How can this be done?

http://www.soldaatmuis.com/diversen/textmargin.JPG

As you can see, the text in this post is too close to the left and right borders.
How can i increase only this margin?
Greetz,

tijmen_4real